This year (2020) the following 10 tools where the most useful and/or helpful ones for me:
10. Confluence Server
- Vendor URL: https://www.atlassian.com/
- Purpose: Wiki server
- Supported OS for server: Linux and (not recommended) MacOS and Windows
- Supported OS for clients: nay that has a browser
9. Bitbucket Server
- Vendor URL: https://www.atlassian.com/
- Purpose: Git server
- Supported OS for server: Linux and (not recommended) MacOS and Windows
- Supported OS for clients: any that has a Git client or browser
8. VMware Fusion Pro
- URL: https://www.vmware.com/de/products/fusion.html
- Purpose: virtualization
- Supported OS: MacOS
7. Blink Shell
- URL: https://blink.sh
- Purpose: SSH and Mosh client
- Supported OS: MacOS
6. Working Copy
- URL: https://workingcopyapp.com
- Purpose: Git client for iOS
- Supported OS: iOS
5. Visual Studio Code
- URL: https://code.visualstudio.com/
- Purpose: (code / configuration) editor
- Supported OS: MacOS, Windows, Linux
4. iSmoothRun
- URL: http://www.ismoothrun.com
- Purpose: workout tracking
- Supported OS: iOS
4. Cursor Pro
- URL: https://www.ixeau.com/cursor-pro/
- Purpose: Mouse pointer magnifier
- Supported OS: MacOS
3. Royal TS(X)
- URL: https://www.royalapps.com/
- Purpose: client for SSH, RDP, VNC, … including password manager
- Supported OS: MacOS (Royal TSX), Windows (Royal TS), iOS with restrictions (Royal TSi)
2. TimingApp
- URL: https://timingapp.com
- Purpose: time tracking
- Supported OS: MacOS
1. Zoom
- URL: https://zoom.us
- Purpose: service for video conferences, webinars, screensharing and chat collaboration
- Supported OS: MacOS, Windows, Linux, iOS, Android
I do not include browser(s) and mail though I used them a lot, but they are too common to mention here.